//Create two children
pid_t child1;
pid_t child2;
child1 = fork();

//wait for child1 to finish, then kill child2
waitpid() ... child1 {
kill(child2) }

pid_t waitpid(pid_t pid, int *status, int options);

pid_t waitpid(pid_t pid, int *statusPtr, int options);

#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/wait.h>

int main (){
    int pid;
    int status;

    printf("Parent: %dn", getpid());

    pid = fork();
    if (pid == 0){
        printf("Child %dn", getpid());
        sleep(2);
        exit(EXIT_SUCCESS);
    }

//Comment from here to...
    //Parent waits proccess pid (child)
    waitpid(pid, &status, 0);
    //Option is 0 since I check it later

    if (WIFSIGNALED(status)){
        printf("Errorn");
    }
    else if (WEXITSTATUS(status)){
        printf("Exited Normallyn");
    }
//To Here and see the difference
    printf("Parent: %dn", getpid());

    return 0;
}